Full-view concentric indicator



Oct. 14, 1952 A. MAYBARDUK 2,613,629

FULL-VIEW CONCENTRIC INDICATOR Filed Aug. 50, 1950 2 SHEETS-SHEET 1INVENTOR. LEO A? Meme/wax armk/viy Oct. 14, 1952 L. A. MAYBARDUKFULL-VIEW CONCENTRIC INDICATOR 2 Sl-EETS-SHEE'I 2 Filed Aug. 30, 1950INVENTOR. Ziau A Mavamaux Patented Get. 14, 1952 FULL-VIEW CONCENTRYICINDICATOR Leon A.'Maybarduk, Sunnyside, N. Y., assignor to GeneralPrecision Laboratory Incorporated,

a corporation of New York Application August 30, 1950, Serial No.182,350

' 1 claims. (01. 116-129) This invention relates to indicators and morespecifically to indicators of the circular dial type having a pluralityof separately movable hands or pointers cooperating with a plurality ofstationary scales. 1 r a One purpose ofthe invention is to provide aninstrument having pointer and reference means characterized by improvedvisibility of the indicia. I r

Another purpose of the invention is to provide improved dialarrangements which are easy and convenient to read andobserve and inwhich the indicators are pointers that are mutually independent. Y I

A further purpose of the invention'is to provide an instrument having-aplurality of stationary circular dials having complete full circlevisibility, and having pointers with full circle mobility for indication"of indicia. Complete visibility of each dialis secured by-a specificarrangement of the pointers whereby no dial is crossed at any point-byany pointer'excepting that one designed to cooperate with the indicia ofthat particularscale.

In the drawings:

Figure 1 is a view of the face of a dial embodyingthe invention. I I

Figure .2 is a sectional side. view of the dial taken on the line 2-2 ofFig. 3.

Figure 3 is a rear view of the dial of Fig. 1.

Referring now to Fig. 1, three concentric'annular scales are indicated.at II, I2 and I3. Each of these scales covers the full 360 degrees of acircle and each is inscribed upon a base consisting of an annular disc.or ring. all bases being in the same plane. However, the sameobjectives will be served if one 'or'more of the scales and theassociated bases are offset to occupy nearby parallel planes, presentingthe same aspect to the observer asthat illustrated in Fig. 1. Theinnermost scale II is inscribed upon a disc or annular ring I4 while thescales l2 and I3 are both inscribed upon a single flat ring Hi. It isobvious, however, that the outermost scale I3 may as Well be inscribedupon the surrounding structure, with an appropriate change in thepointer indicating thereupon. Both the'disc I4 and the flat ring I6 arecentered upon a single axis I'I that is perpendicular to their plane. Apointer I8 is arranged for rotation about the axis I1 and is positionedto indicate upon the inner scale ll. 7 A second pointer I9 is arrangedfor rotation about the same axis I1 and is positioned to indicate uponthe intermediatescale I2, while a third pointer 2| is also arra'naed forrotation about the axis I1 and is positioned to indicate upon the outerscale I3. An annular slot or space 22 is provided between the disc I4and the flat ring I6 through which the shaft of the pointer I9 isbrought forward so that only its tip is visible to the observer, itsshaft being completely concealed by the disc l4 yet permitting fullcircular rotation of the pointer shaft in the slot about its axis I'Iwithout limit. Similarly, the pointer H is brought forward through aslot 23 between the flat ring I6 and a surrounding frame structure 24 sothat the pointer. 2| has unlimitedrfreedom of rotation about its axis I!while only its tip is visible, its shaft being concealed behind the flatring I6 and. the disc l4. The exact construction by which the dialaspect illustrated in Fig. l is achieved is as follows.

Referring to Figs. 2 and 3, in which similar parts are numbered alikeand have the same reference numbers as are employed in Fig, 1, a frame24 is rigidly attached to a hub 26 by means of 'six spoke members 21.Each spoke member is screwed and pinned to the frame 24 as shown, forexample, at 28 and 29, and screwed to the hub 26 as at 3|. A hubextension 32 is pressed into the hub at 33. The disc I4 is pressed ontoa collar extension 34 of the hub extension 32, so that it lies in theplane of the frame face 36 and perpendicular to the axis of the hub 26.The fiatring IB is supported by three arms 31, 38 and 39, so that italso is in the plane of the disc 14 and frame face 36.

The arms 31, 38 and 39 are fastened to the hub 26 by the threadedmembers 40 and extend forwardly and outwardly of the hub 26in suchfashion that a clear space inwardly and forwardly of these arms isprovided for operation of the pointer. I9 and its actuating mechanismand at the same time a clear space outwardly and rearwardly of the armsis provided for operation of the pointer 2!. Thus the supportingv arms31, 38 and 39 while acting as a rigid support for the annular scalebearing ring I6 do not interfere with nor prevent free 360 movement ofthe outer pointers l9 and 2|.

The inner pointer for indication on the scale of the disc I4 is fastenedto a pointer hub 4I' that in turn is secured to an axial shaft 42. Thisaxial shaft 42 is concentric with the hub 26 and hub extension 32, andis journalled in them by means of anti-friction bearings 43 and 44. Themiddle pointer I9 is borne on a pointer shaft 46 that extends from it toa cylindrical sleeve 41. This; sleeve is borne on. two a'nti-.

friction bearings 45 and 49 secured on the hub extension 32, so that thesleeve can rotate meshed with a pinion that is secured on. a

shaft 52 journalled in a bearing hole in'the hub 26. The outer pointer2| is borne on a pointer shaft 53 that moves in the slot 23 between theflat ring [6 and the frame 24. This pointer'shaft 53 is screwed to acylindrical rim 54 which is borne externally by three anti-frictionbearings 56, fastened 120 apart to the frame by studs 59 fastened to theframe 24. The rim is secured against axial motion by a fiange 61 on theframe 24 and by a retaining member 62 screwed to the stud 59 which mayinclude anti-friction members such as balls or rollers. A spur gear 64is connected to the rim 5 3 by means of three arms 66, G1 and 58, eacharm being joined to the innersu'rface. of the rim 54 and to the inneredgeof the, spur gear-8.4. The rim 5 1, the arms 66, 6.1. and $8, andthe spur gear 64 are all carefully positioned so, as not to interferewith the three fiat ring arms. 37, 38 and 39, and so as to avoidinterference. with the pinion 5 i. A second pinionfidis meshed with thespur gear E34 and is fixed to a'shaft H journalled in one of the spokes21 atthe .boss '12.

While the invention has been described in connection with an instrumentutilizing three dials, it will be recognized that the same principle maybe utilized to provide a device having a greater number of indicatorscales, it being only necessary to duplicate the construction of theintermediate indicator mechanism if a greater number of indications aredesired.

What is claimed is:

1. An indicator comprising, acasing having front and rear faces, a hubmember-fastened to the rear face of said casing and extendingforwardlytowardsthe front f-ace'thereoian inner dial fastened to theforwardly extendingportion of said 'hub member and lying substantiallyinthe plane of the front of said casing, at leastone intermediate dial,supporting means therefor fastened. to the rear face of saidcasing andextending forwardly and outwardly positioning said intermediate dial insubstantially the same plane as said-inner dial but radially spacedtherefrom provided a circumferential slot thereoetween, a shaft mountedinternally and axially of said hub member, a pointer carried therebycooperating with said inner dial, a rotatable member rotatably mountedexternally on said hub member, a pointer arm carried by said rotatablemember and positionedforwardly and radially inwardly of said supportingmeans, said pointer. arm having an offset end portion extendingthroughsaid circumferential slot and carrying a. pointer ,co operating withsaid intermediate dial.

An indicator comprising, acasingnhaying front and rear inwardlyextending rim portions, ahub member provided with a flange portion andaforwardly extendingportion, spider arms fastenedto said rear rimportion and said flange portioncentrally supportingsaid hub member ins'a-idcasing,v a first dial bearing suitable indicia afiixed to theforwardly extending portion of said hub member and positioned thereby tolie in substantially the same plane as said front rim portion, a seconddial provided with suitable indicia, supporting members thereforfastened to the flange portion of said hub member and extendingforwardly and outwardly thereof positioning said second dial insubstantially the same plane as said first dial but radially spacedtherefrom providing a circumferential slot therebetween, a shaft carriedby and extending through said hub member, a pointer thereon cooperatingwith the indicia on said first dial, a tubular member rotatably mountedon said hub member, a pointer arm carried-thereby positioned in thespace between said first dial and said supporting members and an offsetend portion on said pointer arm extending through said circumferentialslot and cooperating with the indicia on said second dial.

3. An indicator comprising, a casing having front and rear inwardlyextending rim portions, ahub member provided with a fiange portion and aforwardly extending portion, spider arms fastened to said rear rimportion and said flange portion centrally supporting said hub member insaid casing, an inner dial affixed to the forwardly extending portionofsaid hub and lyin in substantially the same plane as said front rimportion, an intermediate dial, supporting members therefor fastened tothe flange portion of said hub member and extending forwardly andoutwardly thereof positioning said intermediate dialin substantially thesame plane as said inner dial but radially spaced therefrom and from thefront rim portion of said casing providing a first circumferential slotbetween said inner and intermediate dials and-a second circumferentialslot between said intermediate dial and said front rim portion, a shaftcarried by and extending through saidhub member, a pointer carriedthereby cooperating with said inner dial, a tubular member rotatablymounted on said hub member, a pointer arm carried thereby positionedforwardly and radially inwardly of said supporting members said pointerarm having an offset end portion extending through said firstcircumferential slot cooperating with a, dialface, adjacent thereto, arotatable annular memberrotatably mounted internally. of said casing butradially spaced from said tubular member, a pointer arm carried therebyspaced radially outwardly of said supporting members, said lastmentioned pointer arm having an offset end portion extending throughsaid second circumferential, slot and provided with a pointer forcooperation with suitable indicia,

v l. An indicator comprising, a casing having front and rear inwardlyextending rim portions, a hollow, hub havingflanges, at each endthereof, spiderar sfastenedto the rear rim of said casin and the rearflange of said hub centrally supporting said hub in said casing, a firstdial bearing suitable indicia affixed to the front flange of saidhub andsupported thereby in substantially theisame plane as the frontjrimportion of said casing, a rotatable shaft extending through said hollowhub having an indicator arm affixed to its outer end cooperating withthe indicia of said first dial, a second dial having indicia inscribedthereon, supporting arms therefor having their ends fastened to the rearflange of said hub said arms,extending generally forwardly andoutwardlyssupportingsaid.second dial in substantially the sameplan as.said first. dial but circumferentially spaced from, both saidfirst. dialand the front rim of said casing whereby a first circumferential slot isformed between said first and second dials and a second circumferentialslot is formed between said second dial and the front rim of saidcasing, an annular member mounted on said hub radially inwardly of saidsupporting arms and rotatable on said hub, an indicator arm extendingradially of the front edge of said annular member positioned in thespace between said first dial and said supporting arms, said indicatorarm being provided with an oiTset end portion extending through the slotformed between said first and second dials and cooperating with theindicia on one of said dials, a second annular member rotatablysupported by said casing and spaced radially outwardly of saidsupporting arms, an indicator arm carried thereby having an offset endportion extending through the circumferential slot formed between saidsecond dial and said casing and means for independently actuating eachof said indicator arms.

LEON A. MAYBARDUK.

REFERENCES CITED The following references are of record in the file ofthis patent:

